<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img class="img-logo" src="../assets/logo.png" alt />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单区域 -->
        <el-menu background-color="#333744" text-color="#fff" active-text-color="#409BFF" :unique-opened="true" :collapse="isCollapse" :collapse-transition="false" router :default-active="activePath">
          <!-- 一级菜单 -->
          <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
            <!-- 一级菜单的模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{ item.authName }}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/' + subItem.path)">
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{ subItem.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容主体 -->
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data () {
    return {
      // 左侧菜单数据
      menulist: [],
      iconObj: {
        '125': 'iconfont icon-_wode',
        '103': 'iconfont icon-_fenlei',
        '101': 'iconfont icon-_gouwu',
        '102': 'iconfont icon-_dingdan',
        '145': 'iconfont icon-_baobiao'
      },
      // 是否折叠
      isCollapse: false,
      // 被激活的链接地址
      activePath: ''
    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有的菜单
    async getMenuList () {
      // const { data: res } = await this.$http.get('menus')
      // if (res.meta.status !== 200) return this.$message.err('res.meta.msg')
      // this.menulist = res.data
      this.menulist = [
        { id: 125, authName: '用户管理', path: 'users', children: [{ id: 110, authName: '用户列表', path: 'users' }] },
        { id: 103, authName: '权限管理', path: 'rights', children: [{ id: 2, authName: '角色列表', path: 'roles' }, { id: 3, authName: '权限列表', path: 'rights' }] },
        { id: 101, authName: '商品管理', path: 'goods', children: [{ id: 4, authName: '商品列表' }, { id: 5, authName: '分类参数' }, { id: 6, authName: '商品分类' }] },
        { id: 102, authName: '订单管理', path: 'orders', children: [{ id: 7, authName: '订单列表' }] },
        { id: 145, authName: '数据统计', path: 'reports' }
      ]
    },
    // 设置侧边栏是否折叠
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    // 保存链接的激活状态
    saveNavState (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less"  scoped>
.home-container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}

.img-logo {
  width: 55px;
}

.el-aside {
  background-color: #333744;
  .el-menu{
    border-right: none;
  }
}

.el-main {
  background-color: #eaedf1;
}
.iconfont{
  margin-right: 10px;
}
.toggle-button{
  background-color: #4A5064;
  font-size: 10px;
  color: #fff;
  line-height: 24px;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
